The Treaty of Falaise was a forced written agreement made in December 1174 between the captive William I, King of Scots, and Henry II, King of England.

During the Revolt of 1173-1174, William joined the rebels and was captured at the Battle of Alnwick during an invasion of Northumbria. He was transported to Falaise in Normandy while Henry prosecuted the war against his sons and their allies. Left with little choice, William agreed to the Treaty and therefore England's dominion over Scotland. For the first time, the relationship between the king of Scots and the king of England was to be set down in writing. The Treaty's provisions affected the Scottish king, nobles, and clergy; their heirs; judicial proceedings, and transferred the castles of Roxburgh, Berwick, Jedburgh, Edinburgh, and Stirling over to English soldiers; in short, where previously the king of Scots was supreme, now England was the ultimate authority in Scotland.

During the next 15 years, William was forced to observe Henry's overlordship, such as needing to obtain permission from the English crown before putting down local uprisings. The humiliation for William caused domestic trouble for him in Scotland, and Henry's authority extended as far as picking William's bride.

The treaty was annulled in 1189 when King Richard I, Henry's successor, was distracted by his interest in joining the Third Crusade, and William's offer of 10,000 marks sterling. More pre-disposed to William than his father, Richard drew up a new charter on 5 December 1189, known as the Quitclaim of Canterbury, that nullified the Treaty of Falaise in its entirety. This new written agreement restored Scottish sovereignty, reverting to the previously vague and ill-defined personal traditions of fealty and homage between Scottish and English kings, rather than the direct subjugation that Henry demanded.